spring-kotlin-querydsl
playground for spring-boot, kotlin , querydsl (with jpa, hibernate)
build
$ make -C rest-api app.build
run local db (docker)
$ make -C rest-api db.local.up
the magic behind the query-dsl-kapt-codegenerator
This example project is based on ...
Note: QueryDSL works fine with hibernate, but does not require it.
- http://querydsl.com
- https://github.com/querydsl/querydsl/blob/master/querydsl-examples/querydsl-example-sql-spring/src/main/java/com/querydsl/example/config/JdbcConfiguration.java
Whats wrong with orm, jpa, hibernate and in-memory h2-db these days ?
There is no silver bullet. It's born in a world of single-instance big fat application servers. It hardly fits into a modern world of:
- functional programming: e.g. immutable threadsafe pojos / data classes
- CQRS and eventsourcing
- horizontal scaling of polyglot microservices
Make up your mind ...
- How hibernate ruined Monica's career: https://www.toptal.com/java/how-hibernate-ruined-my-career
- Why do I hate hibernate: https://de.slideshare.net/alimenkou/why-do-i-hate-hibernate-12998784
- ORM is an antipattern: http://seldo.com/weblog/2011/08/11/orm_is_an_antipattern
- Opinionated JPA: https://leanpub.com/opinionatedjpa/read
- Lightweight ORM, do it yourself: https://blog.philipphauer.de/do-it-yourself-orm-alternative-hibernate-drawbacks/
- Don't use H2 db for testing, use docker: https://blog.philipphauer.de/dont-use-in-memory-databases-tests-h2/